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(2) Adjusting PID content
Refer to page 2-6, the block diagram of PID control selection, using the following procedure
to activate the PID control and then adjust it while monitoring the response.
( I )
Enable the PID control function (Setting Sn-19 = 09, and if any constant Sn-15 ~ 18
setting value is 66, then none of control terminals 5 ~ 8 can be closed).
( II )
Increase the proportional gain P (Bn-14) as far as possible without creating oscillation.
( III )
Reduce in integral time I (Bn-15) as far as possible without creating oscillation.
( IV )
Increase the differential time D (Bn-16) as far as possible without creating oscillation.
First set the individual PID control constants, and then make fine adjustments.
•
Reducing Overshooting
If overshooting occurs, shorten the derivative time D (Bn-16) and lengthen the integral
time I (Bn-15)
•
Rapidly Stabilizing Control Status
To rapidly stabilize the control conditions even when overshooting occurs, shorten the
integral time I (Bn-15) and lengthen the derivative time D (Bn-16)
App-6
PA 7300
APPENDIX
After adjustment
Time
Response
Before adjustment
After adjustment
Time
Response
Before adjustment
After adjustment
Time
Response
Before adjustment
After adjustment
Time
Response
Before adjustment
Содержание PA7300 Series
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